Etching designs.



Pat'entd Sept. 2, |902.

I. KITSEE. ETCHING DESIGNS. (Application filed S-apt.` 18, 1899. Renewed Feb. 8, 1902'.)

(No Model.)

I nventor..

Witnesses.

TN: nonms ravens co., Puorcyumo.. msnmn'mn. n. c.

UNITED STATES PATENT OFFICE.

ISIDOR KITSEE, lOF PHILADELPHIA, PENNSYLVANIA.

ETCHING DESIGNS.

SPECIFICATION forming part 0f Letters Patent No. 708,052, dated September 2, 1902.

Application iiledeptember 18, 1899. Renewed February 8,1902. Serial No. 93,252. (No specimens.)

To all whom it may concern.-V

Be it known that I, IsIDoR Krrsnn, of the city and county of Philadelphia,S tate of Pennsylvania, have invented certain new and useful Improvements in the Process of Etching, of which the following is a specification.

My invention relates to an improvement in the process of etching.

The etching of metallic plates is mostly accomplished by the immersion of the plate in a solution containing acid capable of combining with the metal to be etched. A great improvement over this process consists inv spraying the plate to be etched. `This process is called by its inventor the .blast process. Undoubtedly the cut of the lines is clearer and the whole process requires less acid than had been heretofore the case; butthe necessary apparatus is cumbersome and a great deal of the acid is lost before it is entirely exhausted.

It is the object of my invention' to simplify,

the process of etching and to obtain results comparing favorably with hand etching with the aid of unskilled labor.

Referring to the drawing which illustrates in sectional view a receptacle orA cabinet, A is the cabinet itself; a, its door; B, the gasinlet pipe; C, the steam-inlet pipe.

D represents the plates resting on their support d.

E is the outlet-pipe for the steam-combined gas.

The underlying principle of my invention consists in the application of the agent capable of etching in the form of gas or fume to the plate to be etched; but as the dried gases alone would not be capable of etching the plate in a manner necessary for artistic printing it is advisable toeither apply moisture to the plate, or, as I prefer, to apply at one and the same time moist steam to the metal to be etched.

The 'modus operandi' of practicing my invention is as follows: The plates to be etched are assembled in a receptacle and are placed on suitable supports. I have found that the etching is accomplished far better if the plates are placed'face downward, so that the moisture will not accumulate on the surface. After the plates are assembled and the receptacle is closed the valves of the pipes B and C, leading, respectively, to the' steam generatorandthe generator of the gases, capable of etching when combined with moisture, are opened and the'receptacle lled simultaneously with the gases and steam.

-The outlet-pipe is provided with a pressurevalve, so that the steam and gas shall exert a certain pressure on the surface of the plates before being able to escape. It is best to have one ofthe sides of the receptacle made of glass, so that the operator can see the progress of the operation.. It is unnecessary to say that all parts of the metallic plate not to be etched have to be carefully waxed or paraflined or provided withany other acid-resistant medium. If at'nearly every section of the shelf on which the plate rests the outer wall of the receptacle is provided with a slit, to be conveniently closed and opened, the plates can each separately at different times be taken out to be examined without opening the receptacle. It is understood that the time of operation will have to vary according to the depth of the lines to be etched, and a shorter or longer time may be required for dierent metals. Repeated trials will soon teach the operator what particular degree of concentration will be required for his work or what length of time is necessary for the operation, and it is in his power through the addition of more or less steam or more or less active gas to secure the desired result.

Having now described my invention, Wh I claim as new, and desire to secure by Letters Patent, is-

1. The method of etching metallic plates, lwhich consists in subjecting said plates simultaneously to the action `of an active gas or vapor and to the action of steam.

2. The method of etching, which consists in bringing in contact the parts of the plates to be etched, simultaneously with two agents each from a separate source, one agent in a ISIDOR K/ITSEE.

Vitnesses:

E. R. STILLEY, WM L ICO 

